| Author | Search for: Ghinet, Sebastian1; Search for: Bouche, Patrick; Search for: Padois, Thomas; Search for: Pires, Louis; Search for: Doutres, Olivier; Search for: Kone, Tenon Charly1; Search for: Triki, Khaled; Search for: Abdelkader, Fahmi; Search for: Panneton, Raymond; Search for: Atalla, Noureddine |
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| Affiliation | - National Research Council of Canada. Aerospace
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| Format | Text, Article |
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| Conference | 49th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2020, August 23-26, 2020, Seoul, Korea |
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| Physical description | 11 p. |
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| Subject | acoustic resonators; acoustic variables control; aircraft; architectural acoustics; cabins (aircraft); glass; metamaterials; noise abatement; porous materials; sound insulation; vehicle performance; wool; yarn; acoustic noise |
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| Abstract | Over the past few decades, various low frequency noise control technology concepts incorporating acoustic metamaterials have been proposed in the literature. The proposed technologies showed promising performance, with a significant noise attenuation rate per thickness unit and are considered as an improved solution when compared to conventional sound insulation materials. Previously presented approaches with layered porous materials and embedded Helmholtz resonators (HR) exhibited considerable potential when tuned at tonal, multi-tonal or narrow frequency bands. In the present study, two noise control solutions were investigated numerically and their noise control performance was validated experimentally in single and double wall configurations when attached to a stiffened curved panel under diffuse field excitation in a sound transmission loss (STL) facility. The first solution comprised glass wool layers and a high flow resistivity micro-perforated screen for broad band noise attenuation. The second solution comprised glass wool layers with embedded HR designed to attenuate the effect of the ring frequency of the curved fuselage panel under diffuse field excitation. The paper discusses the main mechanisms involved in the STL performance of the two noise control solutions in single and double wall configurations. |
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| Publication date | 2020-08-23 |
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| Publisher | Korean Society of Noise and Vibration Engineering |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 8d7fc5de-2240-4263-93fc-44cb03d949f7 |
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| Record created | 2022-07-25 |
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| Record modified | 2022-07-25 |
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